(Delphi ActiveX) HTTP POST with JSON Body

Demonstrates sending an HTTP POST with a JSON body.

For more information, see https://chilkatsoft.com/http_post_with_json_body.asp

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
json: TChilkatJsonObject;
resp: IChilkatHttpResponse;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl -v -X POST https://example.com/v2/checkout/orders \
// -H "Content-Type: application/json" \
// -H "Authorization: Bearer Access-Token" \
// -H "Request-Id: 7b92603e-77ed-4896-8e78-5dea2050476a" \
// -d '{ 
//       "reference_id": "REFID-000-1001",
//       "amount": {
//         "currency_code": "CAD",
//         "value": "10.00"
//       }
//     }'

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

// The following JSON is sent in the request body.

// {
//   "reference_id": "REFID-000-1001",
//   "amount": {
//     "currency_code": "CAD",
//     "value": "10.00"
//   }
// }

json := TChilkatJsonObject.Create(Self);
json.UpdateString('reference_id','REFID-000-1001');
json.UpdateString('amount.currency_code','CAD');
json.UpdateString('amount.value','10.00');

// Adds the "Authorization: Bearer Access-Token" header.
http.AuthToken := 'Access-Token';
http.SetRequestHeader('Request-Id','7b92603e-77ed-4896-8e78-5dea2050476a');
http.SetRequestHeader('Content-Type','application/json');

resp := http.PostJson3('https://example.com/v2/checkout/orders','application/json',json.ControlInterface);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

Memo1.Lines.Add(IntToStr(resp.StatusCode));
Memo1.Lines.Add(resp.BodyStr);
end;